Brake



YJuly 7, 1925. 1,544,590

J. l. MU NCY BRAKE Filed April 5, 1924 ITE-Q5- INVENTOR L/HN Z MUA/TYATTORNEY 2a Patented ,luy 7, 1925,VV z

- UNITED sTATssTPATENT oFFicE.

JOHN I. MUNCY, OF DETROITQMICHIGAN, ASSIGNOR TO THE SVTUDEBAKERCORPOIRIL-A INDIANA, A CORPORATION OF NEW ERSEY.

TIoN, or SOUTH BEND,

' i Application filed April 3,

operation thanv heretofore obtained: in the use of brakes of this type..Y

Another object is to providea means for s preventing radialIdisplacement of the band ends when the brake is applied. v

A further object is to provide a means whereby amore even pressure 'willbe eX-,4

erted on t-he brake drum. I* v A still further object is to positionVtwo spring metal members between the cam and the brake band ends, ptached to a portion of the brake support,

These being among tliefobjects ofthe present invention, the sameconsistsof certain features of construction and combinations of parts to behereinafter described and then claimed with reference tothe accompanyingdrawing which illustrates a suitable embodiment of the invention havingthe above and other objects in View.

'In the drawings: y K Figure 1 is a section taken on the line 1-1 ofFigure 2, which is a sectional view taken through the wheel, the brakingmechanism, axle and axle housing ofa motor vehicle.

Figure 2 is a sectionall view taken on the line 2-2 of Figure' 1,showing the wheel,- brake, and my invention applied thereto.

Figure 3 is a perspective view of one ot the resilient memberspositioned between the cam and brackets, the other being ofsubstantially the same construction.

Referring more in detail to the drawings in which like numerals refer tolike parts, 4 indicates a portion of a motor vehicle rear 56 axlehousing containing the rear axle shaft 5 liournaled in the rollerbearing 6 and which projects through and to whichis secured the usualrear wheel hub 'r having the which members` arel at,y y

" the band 12 throughout its length against llining 13v BRAKE..V f 11924.. seriai No. 704,063. f j

wheel4 8 and the brake drum 9 attached thereto, by the bolts 10 and thenuts11.

Hthin the brake drum 9 is the flexible brake band 12 and theattached'lining 13, f

which are held slightly out of contact with the drum 9 by the spring 22,the bracket 14and the bolt ,15,v the latter being held in the bossedopening 16 in the housing 4. The 'brake' band '12 has lsecured to its'ends,'two

brackets -17 which have normally parallel tioned the cam 19, which, whenoperated by the shaft 2() and the crank arm'21,`ltends to yforce thebandends apart, against theresistance of spring 22.

`Inthe conventional internal band'brakes now in `use, no members such as23 and 24 are interposed between the cam 19 and brackets 17, and as thecam 19is`ro'tated,

because of the flexibilityV of the bands, the cam hasa tendency to forceone of the band ends radially inwardly away from, and the other,radially outwardly against the brake adjacent faces 18, between `*whichfis posi- I i drum 9, thus causing an uneven pressure of f the drunr9,resulting in uneven wear of thel f and usually squealing brakes.` As ameans to prevent the band ends from being radially displaced in thismanner and to insure an even drum pressure, I have inserted between thecam 19 and each of the end brackets 17, the members 23 and 24 which may-be made of flat springfmaterial and 'are clamped to the housing hub y25by thefbolt 26 and nut27, this being the bolt vand nut used to draw thehub 25 around the roller bearing cage 28 and lock the latter in place. yY

It is now evident .that when the ,cam 19 is rotated the friction betweenthe cam 19 and brackets 17 which in the conventional constructionbecause of the flexibility of the one band end radially inwardly, andthe other radially outwardly, will be absorbed by the members 23 and 24,and only the cir! cumfereutial or direct spreading action will betransmitted to the brackets 17, thus'inband, as previously describedtends to force l. In a brake mechanism for motor vel1icles, thecombina-tion with a. support, it brake. drum, e split flexible bandWithin said drum, bracket secured to saidbend adjacent the free endsthereof, and a earn positioned between seid brackets fon-forcing theends of Said exblebffmd weertfof'a plurality of. flat,spring;membersseeuredat their one end to said supportend having their free ends1nterpoeedbetn'een said brackets and said cern.

Q 'n nbrzikeinechenisin for motor v ehii cles, lthe eornbinationf withatl brake, drurn,z a support -t lrer elor,Y efzsplit circuler` lexiblefband Within seiddrinn, and a cern positioned4 Y betWc vn-.tlie ends ,ofysaidrbrele bend, ein

pluralityof, Het, spring` members vslidzrblyinterposedibetiyeen `seidends ofA said brelie,

cured to said brake support. v

3. Ine brake' mechanism .for inotor Vel11- cles, the. combination` 5withn brakedrunr`v` a` support therefor, a .split flexible band within saiddrum, and a., camseperating the ends of said brake; be;nd, .of..n.pglulj'ality oi, flat,

spring. inenibersslidably interposed between said ends ofsoid brake,band and said cern,

seid members b eingrdetachably secured to..

said brake support.,

4. lne brake ineclninisnriorniotor Webicles, the combination witha-,lln'ake drnnnn i split flexible-band :within `said drum,4 finder cernfor forcing the ends of said brake bend apart, `or zr plurality ofmembers ezicli coniprising aiflirt prtionyfzr curif'edrpoiion, end esecond flat portion extending et en angle to said first flat portion,said second portion secured .toe support-.andi said first portion,l

,seid `drulnnfnd u ,cinn positioned between.Y

vradially inenten- .sible ,Ineens secured to ,aid support and YslidablylprojectingbtWeen1Seid @ein and from said estinto Vseid band .i

y(5. In..,eo1nbinzition ,with .a supper@brake Y dru1n ,.n, splitcircular flexible bend'l Within portion secured to seid support, fecurved portion surrounding 1 portion of said snpport, and a, radiallyextending flexible por- ,tioni extending between said cern yand theyends of said lexibleband 'orpreventing i' pressuref Vradial .'t,o. said,drunn from being trzinsrn'itted, by* seid earn tofseid bra-ke ends'.`

....Signed by noeA at VDetroit,Michigan, A. this 28th. dayof March,JennrfMUMnff-f @Witnesses u' DONALD. B, lYAiTii, r HoDGeonSPiEnon saiddrum, and ai,cainpositioned between the" Y Y ends lo iiseicl band,o'tin'eans having-affine band eincbsaid c aln, sand members belngse.-A

